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%I #10 Dec 12 2021 19:51:05
%S 2,3,4,5,6,7,8,10,11,13,14,16,17,19,22,23,26,29,31,32,34,37,38,41,43,
%T 46,47,53,58,59,61,62,64,67,71,73,74,79,82,83,86,89,94,97,101,103,106,
%U 107,109,113,118,122,127,128,131,134,137,139,142,146,149,151,157,158
%N Numbers whose reduced system of residues forms an arithmetic progression. It consists of primes, twice primes, and powers of 2.
%D Freud R. and Gyarmati E.: Szamelmelet [Number Theory]. Nemzeti Tankonyvkiado. Budapest (in Hungarian). An exercise concerning Phi.
%K nonn
%O 1,1
%A _Labos Elemer_, Dec 18 2000
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